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Code Issues Releases Wiki Activity

Turn on random access for Syzygy files in Windows (#1840)

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* This is the Windows version of
https://github.com/official-stockfish/Stockfish/pull/1829

No functional change.
This commit is contained in:
mstembera 2018-12-23 07:09:03 -08:00 • committed by Marco Costalba
parent 59d32f8edd
commit ae5d2c38e1
1 changed files with 2 additions and 1 deletions
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3
src/syzygy/tbprobe.cpp
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@ -224,8 +224,9 @@ public:
exit(1); exit(1);
} }
#else #else
// Note FILE_FLAG_RANDOM_ACCESS is only a hint to Windows and as such may get ignored.
HANDLE fd = CreateFile(fname.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr, HANDLE fd = CreateFile(fname.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr); OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, nullptr);
if (fd == INVALID_HANDLE_VALUE) if (fd == INVALID_HANDLE_VALUE)
return *baseAddress = nullptr, nullptr; return *baseAddress = nullptr, nullptr;